Measuring the bounds of the PISN mass gap will provide insights into stellar evolution and fundamental physics [1]}, [2]}, [3]}, [4]}.
However, one needs to account for the dynamical processes that can lead to black holes in this mass range.
In dense stellar environments, such as globular clusters and nuclear star clusters, gravitational encounters of black holes in the cluster core harden the orbits of binary black hole systems, facilitating mergers within the cluster [5]}, [6]}, [7]}.
